BIOLOGY 3SS3 Lecture Notes - Semelparity And Iteroparity, Serotiny
17 Apr 2014
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Document Summary
Life history refers to patterns of how organisms allocate resources to key components underlying fitness (reproductive success); life history characteristics (affect fitness): survival (lx, growth, reproduction (fx, dispersal. What process is really occurring to give the appearance of choice: evolution, phenotypic plasticity, natural selection is selection random variations, on average, variants which survive are better at producing offspring over the long term than those which don"t survive. What are potential advantages of producing fewer offspring with the same amount of energy: greater chance of survival, grow up to be more fit in turn: offspring higher quality leads to higher fecundity, better dispersal. Compared to k strategists, r strategists should: have relatively fast life cycles, reach maturity earlier, allocate more resources tor reproduction (and thus reproduce more and survive less, produce more offspring with less resources for each, be more aggressive about dispersal.
